please i need help.. this is not like this before.. when i look at the center of the lens, it has black that block the lens... i think this is the iris. but i think its stock or broken. i dont have any idea what is this.. and when i capture sumthin, the blur at the background is not normal. instead of forming a circle, its not circle anymore.... please help...
Test the lens.
1) Lens off camera, no lens caps. Look at the iris - it should be small.
2) Mount to camera. Look at iris. It should be very large.
3) Select Aperture priority and set a small aperture - f/16 or so.
4) Look into the lens and fire of a shot or two - does the iris become small, then go large again after the shot? If so, your lens is probably working fine. Lenses rarely break.
I think it has something to do with the aperature.
Go to the mode dial "A", and move the front finger dial (by your right index finger) to the right until the aperature is as big as you can get it. This should change the size of the "iris".
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